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[Bug nptl/16630] Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix "FIXME: Ingo" issue)
- From: "cjones.bugs at gmail dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sourceware dot org
- Date: Tue, 25 Feb 2014 04:51:18 +0000
- Subject: [Bug nptl/16630] Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix "FIXME: Ingo" issue)
- Auto-submitted: auto-generated
- References: <bug-16630-131 at http dot sourceware dot org/bugzilla/>
https://sourceware.org/bugzilla/show_bug.cgi?id=16630
--- Comment #2 from Chris Jones <cjones.bugs at gmail dot com> ---
(In reply to Rich Felker from comment #1)
> Ideally this asm will be removed at some point; I think that would resolve
> this issue automatically.
Do you happen to know if that's filed already? I'm curious what it would be
replaced with.
>
> BTW, the idea of letting apps hook __kernel_vsyscall is a very bad one. In
> order to fix issue #12683, use of __kernel_vsyscall needs to be abandoned
> for cancellable syscalls. Treating such hooking as a supported usage would
> preclude fixing a serious open bug.
Oh, please don't let me give you the wrong idea; I'm not at all advocating for
official support of hooking __kernel_vsyscall. What I do with
__kernel_vsyscall stays in the privacy of my home ;). (Trust me, I don't want
to be touching it either.) But please take this patch at face value.
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